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VAN HOEVENBERGH.

PRINTING TELEGRAPH. No. 313,786. Patented Mar. 10, 1885.

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WITNESSES INVENTOR I By his Attorneys wfloeyenbeiyb lm/Q. ayyggmm Warren STATES PATENT @rrrca HENRY VAN HOEVENBERGH, OF ELIZABETH, N. J., ASSIGNOR TO THE BALTIMORE AND OHIO- TELEGRAPH COMPANY, OF BALTIMORE, MD.

RlNTllilG TELEGRAPl-l.

SPECIFICATION forming part of Letters Patent No. 313,786, dated March 10,1885.

Application filed April 30, 1883.

To all whom it may concern:

Be it known that I, HENRY VAN HoE'vEN- BERGH, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Printing-Telegraphs, of which the following is a specification.

My invention relates to certain improvements in the construction and organization of the escapement apparatus employed in printing-telegraphs for determining the positions of two independent type-wheels, for the purpose of printing from either one, as may be desired.

The object of the invention is to provide means whereby either of the two type-wheels may be actuated independently of the other, and the type-wheel which is not actuated may be automatically arrested in a predetermined position, or at the unison-point, by the same action which permits the advancement of the moving type-Wheel.

The invention consists in mounting two type-wheels of peculiar construction side by side upon two independent arbors, to each of which wheels is secured a scape-wheel and a bevel gear-wheel. The wheels of both systems are in thesame axial line. Between thefaces of the gear-wheels is placed a bevel-pinion, the teeth of which engage the teeth of both gear-wheels, thereby linking them together. This pinion is carried upon an arbor at the extremity of a wrist crank or arm extending at right angles from one of the arbors, and the three wheels constitute an epicyclic train. The axis of the revolution of the pinion is thus perpendicular to that of the arbor of the typewheel which carries it, and this arbor is normally revolved in a given direction through the instrumentality of a suitable clockmechanism. A single anchor escapemcnt, constructed to be actuated in opposite directions through the action of alternate positive and negative impulses transmitted through two suitable electro-magnets. serves as a release for both scape-wheels. The extremity of the polarized armature of a third electro-magnet extendsbetween the two type-wheels, and may be inclined toward one type-wheel or the other, according to the character of the current transa close the same.

(No model-l mitted through the electro-magnet. Then this armature is inclined toward. one typewheel, it projects into the path of a pin carried upon that type-wheel, and acts to arrest its movement at the unison-point. When in clined toward the other type-wheel, the armature acts in like manner to arrest the movement of that type wheel at a corresponding point.

In the accompanying drawings, Figure l is a front elevation, partly in section, of such portions of a printing-instrument as are necessary to illustrate my invention, and Fig. 2 is a side elevation of the same.

Referring to the drawings, a and a represent two horizontal arbors placed in the same axial line, and serving as supports for two type-wheels, A and A, respectively. The arbor a is revolved in the direction indicated by the arrow as, through the agency of a suitable train of clock mechanism. Thcarbor a however, is stationary, serving merely as asup port for the corresponding system of wheels, hereinafter described.

Near the confronting extremities of the arbors are carried two beveled gear-wheels, b

and b respectively, loosely mountedthereon and revolving independently thereof. An arm or right-angled extension, 0, is carried upon the arbor a between the two gean-wheels. A bevel-pinion, d, is carried at the extremity of the arm 0 and revolves freely thereon. The teeth of this pinion engage the confronting teeth of the gear-wheels and communicate a revolution to one or the other,or to both,of the gear-wheels when the arbor a is revolved, in a manner hereinafter explained.

Two hollow scapewheels, e and 0", are respectively afiixed to the gear-wheels and in- Thesides c of these wheels are formed so as to come into proximity to each other, and at their adjacent edges a series of radial teeth, 6 is formed upon each wheel.

An anchor-escapement, F, is employed for controlling the movements of the two scapewheels 6 and 0 For this purpose it is constructed with pallets f and J, of suflicient breadth to engage both series of teeth. Two electro-magnets, F and F are employed for f, in a manner well understood.

The scape-wheels e and e are constructed with elongated hubs or sleeves e and 6, respectively, surrounding the arbors a and (o The type-wheels A and A are respectively mounted upon these sleeves. For the purpose of bringing the peripheries of the type-wheels as nearly together as practicable, the supporting arms or spokes g of the rims g are curved in such manner as to inclose the gear and scape wheels. A sufficient space must, however, be left between the rims g of the two wheels to permit the arm of the escapement F, for supporting the pallets f, to extend between them.- This arm may, however, be very thin, and thus the separation may be narrow.

Upon the type-wheel A is carried an inwardly-projecting pin, 1', which extends i slightly beyond the inner edge of the rim 9 of that wheel. A similar pin, 6, projects inward from the other type-wheel, A Into the path of one or the other of the pins i is projected the extremity of a polarized armature, a, of an electro-magnet, N. The lengths of the pins 2' are such that when the armature n is at the limit of its movement in the direction of one of the type-wheels the corresponding pin will be carried by the revolution of the type-wheel against the armature, and the movement of that type-wheel will be arrested.

In like manner, when actuated in the opposite direction, the armature will arrest the movement ofthe other type-wheel at agiven point through the action of its corresponding pin.

Suitable adjustable stops, it and 13 may be employed for limiting the movements of the armature n.

The electro-magnets N and F and F are all designed to be included in a single electric circuit, together with any suitable device for transmitting alternate electric impulses therethrough.

Any of the usual devices may be employed for actuating a platen, P, to effect an impression from the desired type-wheels, such clevice preferably being actuated through the instrumentality of electric impulses transmitted through an independent conductor.

A blank or open space, 9 is left upon each of the type-wheels A, and this space bears such relation to the corresponding pin, t, that it will be opposite the platen P when the typewheel is arrested by the polarized armature a. If, therefore, the platen P be actuated when either of the type-wheels is thus arrested at its unison-point, no impression will be received from that type-wheel.

The operation of the instrument is as follows: Whenever rapid electric impulses are transmitted through the conductor Z, these impulses will act to vibrate the escapement device F, and the shaft a, acting through the arm 0 and pinion d, will tend to cause both gear-wheels b and b to revolve in the direction indicated by the arrow m simultaneously. Electric impulses of the character required to thus actuate the escapement F will not, however, be of sufficient duration to cause the polarized armature n to be actuated, on account of the greater magnetic inertia of the cores of the magnet N. The armature n will therefore remain in the position which it happens to cocupy until aprolonged impulse is transmitted. Considering this position to be that indicated in the drawings-that is to say,adj acent to the type-whee1Aboth type-wheels will continue to revolve until the pine" is brought into contact with the'extremity of the armature n, at which point the type-wheel A will be arrested. The type-wheel A, however, will continue to revolve through the action of the epicyclic train, as will appear from the fact that, the gear-wheel b being arrested, the pinion at will be caused by the revolution of the arm 0 to roll upon the teeth of the wheel bin, the direction indicated by the arrow x,thereby causing the wheel I) to continue its revolution in the direction indicated by the arrow w. The movement of the type-wheel A will then be arrested when the required character is presented to the platen]? by causing the im pulses transmitted through the conductor Z to cease. It the platen P be then actuated, the character required will be printed from the type-wheel A but no impression will be effected by the type-wheel A, for the reason that its blank space g is presented to the platen.

It now asecond character is to be printed from A is transmitted through the electro-magnet N, and this impulse, being of a greater duration than the alternating impulses employed for actuating the escapement-arm F, will immediately cause the armature n to release the type-wheel A and to project'into the path of the wheel A \Vhenthe armature n has been thus actuated and alternating impulses are transmitted for the purpose of bringing the required character onthe type-wheel A into position to be printed, the movement of the type-wheel A will be arrested at its unisonpoint by means of the pinf and armature 12. So long as the alternating impulses are transmitted the type-wheel A will be actuated in the direction indicated by the arrow x, through the influence of the motion of the arbor a, in a manner precisely similar to that described with reference to the type-wheel A The the face of the gear-wheel 6*, thereby causing the gear-wheel b and the type-wheel A to be revolved in the direction indicated by the arrow w.

Instead of employing beveled gear-wheels and a pinion of corresponding character, it may in some instances be found desirable to employ crown-wheels or other form of .strai ght gearing.

I claim as my invention 1. The combination, substantially as hereinbefore set forth,of two independently-movable type-wheels and an epicyclic gearing mechanically uniting said typewvheels.

2. The combination, substantially as hereinbefore set forth, of two independently-mova-- ble type-wheels, two scape-wheels, respect ively attached thereto, an escapement device engaging the teeth of' both of said scapewheels, and an epicyclic gearing uniting said type-wheels.

3. The combination, substantially as here inbefore set forth, of two type-wheels, two

' scape-wheels, respectively attached thereto,

an escapement device engaging the teeth of both said scape-wheels, two parallel gearwheels applied to and moving with saidtypewheels, a movable pinion engaging the teeth of both of said gear-wheels, and having its axis of revolution perpendicular to the axis of said gearwvheels, and means, substantially such as described, for revolving said pinion about the axis of revolution of said wheels.

at. The combination, substantially as hereinbefore set forth, of the type-wheels A and A the gear-wheels b and b, the arbor a, the arm 0, the pinion chengaging the teeth of both of said gear-wheels, and means, substantially such as described, for arresting the movement of either of said typewheels, and continuing the movement of the remaining typewheel.

5. The combination, substantially as hereinbeforc set forth, of two type-wheels, means for revolving either or both of said typewhcels in a given direction, two detents,respectively applied to said type-wheels, an electro-magnet, and a polarized armature eX- tending between said type-wheels and acting to arrest the movement of one or the other of the same, according to the direction of a current transmitted through said electro-magnet,

by intercepting the path of the corresponding detent.

6. The combination, substantially as hereinbefore set forth, of a type-wheel, a gear wheel concentric therewith, an arbor supporting said gear-wheel, means for revolving said arbor, a pinion caused by the revolution of said arbor to revolve in a plane perpendicular to the axis of revolution of said arbor, a second type-wheel and a second gear-wheel mounted upon an independent arbor, and means, substantially such as described, for rotating one or both of said type-wheels through the inst-rumentality of said pinion and gearwheels.

7. The combination, substantially as hereinbefore set forth, of two type-wheels, two scape-wheels, respectively attached thereto, a single eseapenicnt-anchor applied to both of said scape-wheels, and means, substantially as described, for controlling the movements of said escapement-anchor.

8. The combination, substantially as hereinbefore set forth, of two type -wheels, two scape-wheels, respectively applied thereto, and a single escapement-anchor applied to both of said scape-wheels.

In testimony whereof I have hereunto subscribed my name this 25th dayof April, A.D. 1883.

HENRY VAN HOEVENBERGH.

\Vitnesses:

DANIEL W. EDG-EOOMB, CHARLES A. TERRY. 

